Yes, I also find this very annoying that they changed this feature without any warning, resulting that all programs that needed absolute paths like music player in order to find your library on another partition that you might be sharing with Windows or some other OS, are all broken since mounting path changed.

This breaks programs using absolute paths, like music players (Rhythmbox), photo library management (Shotwell) and Safely Remove from the unity launcher (the quicklist item does not appear on partitions of an USB HDD). So I have reverted back to Ubuntu 12.04 which doesn't have this problem.